java窗口文本_java 文本窗口

喜欢ヅ旅行 2022-11-02 11:46 299阅读 0赞

简介

java 文本窗口

code

package calcu;

import java.awt.BorderLayout;

import java.awt.GridLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

import javax.swing.SwingConstants;

public class TextComponentFrame extends JFrame {

public static final int TEXTAREA_ROWS = 8;

public static final int TEXTAREA_COLUMNS = 20;

public static void main(String[] args) {

TextComponentFrame t = new TextComponentFrame();

t.setTitle(“ImageTest”);

t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

t.setVisible(true);

}

public TextComponentFrame() {

JTextField textField = new JTextField();

JPasswordField passwordField = new JPasswordField();

JPanel northPanel = new JPanel();

northPanel.setLayout(new GridLayout(2, 2));

northPanel.add(new JLabel(“User name:”, SwingConstants.RIGHT));

northPanel.add(textField);

northPanel.add(new JLabel(“Password: “, SwingConstants.RIGHT));

northPanel.add(passwordField);

add(northPanel, BorderLayout.NORTH);

JTextArea textArea = new JTextArea(TEXTAREA_ROWS, TEXTAREA_COLUMNS);

JScrollPane scrollPane = new JScrollPane(textArea);

add(scrollPane, BorderLayout.CENTER);

// add button to append text into the text area

JPanel southPanel = new JPanel();

JButton insertButton = new JButton(“Insert”);

southPanel.add(insertButton);

insertButton.addActionListener(event -> textArea.append(

“User name :” + textField.getText() + “Password: “ + new String(passwordField.getPassword()) + “\n”));

add(southPanel, BorderLayout.SOUTH);

pack();

}

}

Q&A

滚动窗口应该是textArea的子类。

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